This introduction gives an overview of Zagzebski’s work in epistemology during the last twenty-five years, introducing the papers included in the collection. The subject areas of most of contemporary epistemology are included in these chapters: (1) knowledge and understanding, (2) intellectual virtue, (3) epistemic value, (4) virtue in religious epistemology, (5) intellectual autonomy and authority, and (6) skepticism and the Gettier problem. Some chapters are among the earliest works published on a given topic—e.g., understanding, intellectual virtue, the value problem for knowledge, intellectual authority. Others take a novel approach to an old problem—Gettier, virtue in religious epistemology, a new transcendental argument against skepticism.